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From b53ec8d7dca8eba189c45ae29e4d5ff03e5e5556 Mon Sep 17 00:00:00 2001
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From: Evgeny Vereshchagin <evvers@ya.ru>
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Date: Fri, 27 Nov 2015 08:54:42 +0000
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Subject: [PATCH] core: fix rlimit parsing
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* refuse limits if soft > hard
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* print an actual value instead of (null)
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see https://github.com/systemd/systemd/pull/1994#issuecomment-159999123
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Cherry-picked from: 0316f2aeebde7569d24a93ab788ac4bc1657b11b
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Related: #1351415
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---
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src/core/load-fragment.c | 5 ++++-
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src/test/test-unit-file.c | 21 +++++++++++++++++++++
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2 files changed, 25 insertions(+), 1 deletion(-)
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diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
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index d307f1c..2f6209e 100644
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--- a/src/core/load-fragment.c
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+++ b/src/core/load-fragment.c
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@@ -1160,6 +1160,7 @@ static int parse_rlimit_range(
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struct rlimit **rl,
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int (*rlim_parser)(const char *, rlim_t *)) {
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+ const char *whole_value = value;
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rlim_t soft, hard;
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_cleanup_free_ char *sword = NULL, *hword = NULL;
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int nwords, r;
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@@ -1175,9 +1176,11 @@ static int parse_rlimit_range(
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if (r == 0 && nwords == 2)
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r = rlim_parser(hword, &hard);
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if (r < 0) {
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- log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", value);
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+ log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", whole_value);
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return 0;
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}
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+ if (nwords == 2 && soft > hard)
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+ return log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid resource value ("RLIM_FMT" > "RLIM_FMT"), ignoring: %s", soft, hard, whole_value);
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if (!*rl) {
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*rl = new(struct rlimit, 1);
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diff --git a/src/test/test-unit-file.c b/src/test/test-unit-file.c
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index 931dfed..8acf071 100644
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--- a/src/test/test-unit-file.c
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+++ b/src/test/test-unit-file.c
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@@ -570,6 +570,27 @@ static void test_config_parse_rlimit(void) {
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assert_se(rl[RLIMIT_NOFILE]->rlim_cur == RLIM_INFINITY);
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assert_se(rl[RLIMIT_NOFILE]->rlim_cur == rl[RLIMIT_NOFILE]->rlim_max);
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+ assert_se(config_parse_limit(NULL, "fake", 1, "section", 1, "LimitNOFILE", RLIMIT_NOFILE, "10:20:30", rl, NULL) >= 0);
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+ assert_se(rl[RLIMIT_NOFILE]);
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+ assert_se(rl[RLIMIT_NOFILE]->rlim_cur == 10);
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+ assert_se(rl[RLIMIT_NOFILE]->rlim_max == 20);
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+
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+ /* Invalid values don't change rl */
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+ assert_se(config_parse_limit(NULL, "fake", 1, "section", 1, "LimitNOFILE", RLIMIT_NOFILE, "wat:wat", rl, NULL) >= 0);
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+ assert_se(rl[RLIMIT_NOFILE]);
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+ assert_se(rl[RLIMIT_NOFILE]->rlim_cur == 10);
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+ assert_se(rl[RLIMIT_NOFILE]->rlim_max == 20);
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+
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+ assert_se(config_parse_limit(NULL, "fake", 1, "section", 1, "LimitNOFILE", RLIMIT_NOFILE, "66:wat", rl, NULL) >= 0);
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+ assert_se(rl[RLIMIT_NOFILE]);
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+ assert_se(rl[RLIMIT_NOFILE]->rlim_cur == 10);
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+ assert_se(rl[RLIMIT_NOFILE]->rlim_max == 20);
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+
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+ assert_se(config_parse_limit(NULL, "fake", 1, "section", 1, "LimitNOFILE", RLIMIT_NOFILE, "200:100", rl, NULL) >= 0);
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+ assert_se(rl[RLIMIT_NOFILE]);
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+ assert_se(rl[RLIMIT_NOFILE]->rlim_cur == 10);
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+ assert_se(rl[RLIMIT_NOFILE]->rlim_max == 20);
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+
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free(rl[RLIMIT_NOFILE]);
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assert_se(config_parse_sec_limit(NULL, "fake", 1, "section", 1, "LimitCPU", RLIMIT_CPU, "56", rl, NULL) >= 0);
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assert_se(rl[RLIMIT_CPU]);
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